3S 25A Li-ion Battery Management System (BMS)

Overview:
The 3S 25A Li-ion BMS is designed to protect and manage lithium-ion battery packs configured with 3 cells in series. It supports continuous discharge currents up to 25 amps and incorporates essential safety features including overcharge, over-discharge, overcurrent, short circuit protection, and passive cell balancing to maintain battery health.

Technical Specifications:

• Battery Type: Lithium-ion (Li-ion / NMC)

• Cell Configuration: 3S (3 cells in series)

• Nominal Voltage: 11.1V (3.7V × 3)

• Maximum Charge Voltage: 12.6V (4.2V × 3)

• Overcharge Protection Voltage: Approx. 4.25V per cell

• Over-discharge Protection Voltage: Approx. 2.8V per cell

• Continuous Discharge Current: 25A

• Overcurrent Protection: Typically 30A to 35A

• Short Circuit Protection: Yes, with auto recovery

• Cell Balancing: Passive balancing included

• Balancing Current: 30–60 mA per cell

• Quiescent Current: <50 µA

• Operating Temperature Range: -20°C to +60°C

Protection Features:

• Overcharge protection

• Over-discharge protection

• Overcurrent protection

• Short circuit protection

• Passive cell balancing

Applications:

• 3S lithium-ion battery packs

• Portable power systems

• Electric bikes and scooters

• DIY electronics projects

• Robotics and remote control devices

• Solar backup systems